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2022 (6)

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Book
Advanced Synchrotron Radiation Techniques for Nanostructured Materials
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ISBN: 3039216813 3039216805 Year: 2019 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Abstract

Nanostructured materials exploit physical phenomena and mechanisms that cannot be derived by simply scaling down the associated bulk structures and phenomena; furthermore, new quantum effects come into play in nanosystems. The exploitation of these emerging nanoscale interactions prompts the innovative design of nanomaterials. Understanding the behavior of materials on all length scales—from the nanostructure up to the macroscopic response—is a critical challenge for materials science. Modern analytical technologies based on synchrotron radiation (SR) allow for the non-destructive investigation of the chemical, electronic, and magnetic structure of materials in any environment. SR facilities have developed revolutionary new ideas and experimental setups for characterizing nanomaterials, involving spectroscopy, diffraction, scatterings, microscopy, tomography, and all kinds of highly sophisticated combinations of such investigation techniques. This book is a collection of contributions addressing several aspects of synchrotron radiation as applied to the investigation of chemical, electronic, and magnetic structure of nanostructured materials. The results reported here provide not only an interesting and multidisciplinary overview of the chemicophysical investigations of nanostructured materials carried out by state-of-the-art SR-induced techniques, but also an exciting glance into the future perspectives of nanomaterial characterization methods.


Book
Agricultural and Food Waste : Analysis, Characterization, and Extraction of Bioactive Compounds and Their Possible Utilization
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Year: 2020 Publisher: Basel, Switzerland : MDPI - Multidisciplinary Digital Publishing Institute,

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The food processing industries produce millions of tons of losses and waste during processing, which are becoming a grave economic, environmental, and nutritional problem. Fruit, vegetable, and food industrial solid waste include leaves, peels, pomace, skins, rinds pulp, stems, seeds, twigs, and spoiled fruits and vegetables, among other waste released in food production, which can be formed during cleaning, processing, cooking, and/or packaging. These wastes are characterized by being an important source of bioactive compounds, such as phenolic compounds, dietary fibers, polysaccharides, vitamins, carotenoids, pigments, and oils, among others. These bioactive compounds are closely associated with beneficial effects on human health. These by-products can be exploited in different industries: in food industries for the development of functional ingredients and/or new foods or natural additives; in pharmaceutical industries for medicinal, healthcare, or cosmetic products; in agricultural industries as fertilizers or animal feed; and in chemical industries, among others. The reutilization of these by-products will ensure the sustainable development of food industries and reduce their environmental impact, which will contribute to the fight against environmental problems, leading to potential mitigation of climatic change. Therefore, the determination of bioactive compound composition in agricultural and food waste and the production of extracts containing these compounds is the first step towards its reutilization.


Book
Valorization of Material Wastes for Environmental, Energetic and Biomedical Applications
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ISBN: 3036556923 3036556915 Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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The development of materials from industrial wastes has attracted the attention of the research community for years. A material's physico-chemical characteristics have specific impacts its properties and their application in environmental, energetic, and biomedical areas, such as in pollutant removal; CO2 capture; energy storage; catalytic oxidation and reduction processes; the conversion of biomass to biofuels; and drug delivery. Examples of such materials are activated carbons, clays, and zeolites, among others. The aim of this Special Issue is to collect the recent advances and progresses developed in this field considering valorised materials from industrial wastes and their applications in environmental, energetic, and biomedical areas.


Book
Interaction of Ionizing Photons with Atomic and Molecular Ions
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Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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The interaction of ionising radiation with atomic and/or molecular ions is a fundamental process in nature, with implications for the understanding of many laboratory and astrophysical plasmas. At short wavelengths, the photon–ion interactions lead to inner-shell and multiple electron excitations, leading to demands on appropriate laboratory developments of sources and detectors and requiring advanced theoretical treatments which take into account many-body electron-correlation effects. This book includes a range of papers based on different short wavelength photon sources including recent facility and instrumental developments. Topics include experimental photoabsorption studies with laser-produced plasmas and photoionization of atomic and molecular ions with synchrotron and FEL sources, including modifications of a cylindrical mirror analyzer for high efficiency photoelectron spectroscopy on ion beams. Theoretical investigations include the effects of FEL fluctuations on autoionization line shapes, multiple sequential ionization by intense fs XUV pulses, photoelectron angular distributions for non-resonant two-photon ionization, inner-shell photodetachment of Na- and spin-polarized fluxes from fullerene anions.


Book
Green Synthesis of Nanomaterials
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ISBN: 3039217879 3039217860 Year: 2019 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Nanomaterials possess astonishing physical and chemical properties. They play a key role in the development of novel and effective drugs, catalysts, sensors, and pesticides, to cite just a few examples. Notably, the synthesis of nanomaterials is usually achieved with chemical and physical methods needing the use of extremely toxic chemicals or high-energy inputs. To move towards more eco-friendly processes, researchers have recently focused on so-called “green synthesis”, where microbial, animal-, and plant-borne compounds can be used as cheap reducing and stabilizing agents to fabricate nanomaterials. Green synthesis routes are cheap, environmentally sustainable, and can lead to the fabrication of nano-objects with controlled sizes and shapes—two key features determining their bioactivity.


Book
Graphene and Other 2D Layered Nanomaterials and Hybrid Structures: Synthesis, Properties and Applications
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Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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ResearchGate academic profile and social networking site for researchers: "Graphene, one of the most interesting and versatile materials of modern times, is recognized for its unique properties, which are strongly different from its bulk counterpart. This discovery has recently stimulated research on other two-dimensional (2D) systems, all consisting of a single layer of atoms. Two-dimensional materials have also emerged as major candidates for use in next-generation applications as a result of the rapid discovery of their any properties. In this Special Issue, we have collected a few recent studies that examine some of these new areas of work in the field of 2D materials."


Book
Historical Wood: Structure, Properties and Conservation
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Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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This book is a selection of manuscripts devoted to the conservation and preservation of wooden cultural heritage. The articles present the new methods for conservation of various historical wooden artefacts, reliable modern techniques for characterisation of the wood structure, properties and degree of degradation, and discusses problems and doubts related to all aspects of conservation and re-conservation of wooden cultural heritage. It contains both review and research papers to give the readers a broader picture of the problems and issues related to the conservation of wooden historical objects and structures. We need to remember that wooden cultural heritage is an integral part of our culture and history that define our humanity. We are obliged to protect it, save it from oblivion, and preserve it for future generations.

Keywords

X-ray photoelectron spectroscopy (XPS) --- X-ray diffraction (XRD) --- dynamic vapor sorption (DVS) --- archaeological wood --- wood conservation and preservation --- piles --- waterlogged wood --- soft rot --- decay --- microscopy --- degraded wood --- silane --- FT-IR --- alkoxysilanes --- wood-silane interactions --- wood stabilisation --- wood conservation --- silane treatment --- reliquary --- electron microscopy --- wood --- restoration --- halloysite nanotubes --- Nanhai No. 1 shipwreck --- waterlogged archaeological wood (WAW) --- wood properties --- microbial composition --- gap-fillers --- gap-filling materials --- wooden artefacts --- wood exposed outdoors --- microballoons --- resins --- glass beads --- cellulose powder --- binders --- hygrothermal performance --- timber buildings --- cultural heritage --- numerical simulations --- monitoring and sensors --- climate models --- fungi identification --- mold growth modelling --- soda lignin --- penetration --- infrared spectroscopy (ATR-FTIR) --- pyrolysis gas chromatography mass spectrometry (Py-GC/MS) --- scanning electron microscopy (SEM) --- historical wood --- wood degradation --- artefact --- heritage --- conservation --- cultural conservator --- consolidation --- sorption --- degradation --- drying --- PEG --- alum --- reburial --- in situ preservation --- medieval shipwreck --- charred wood --- chemical analysis --- EDS --- FTIR --- XRD --- proximate analysis --- PEG treatment --- acetic acid --- volatile emissions --- GC–MS --- marine archaeological wood --- moisture content --- polyethylene glycol --- computational modelling --- Mary Rose --- predictive model --- archaeological wooden structures --- structural analysis --- geodetic systems --- drying process --- heritage wood --- sustainability --- bio-based polymers --- consolidants


Book
Wide Bandgap Based Devices: Design, Fabrication and Applications, Volume II
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Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Wide bandgap (WBG) semiconductors are becoming a key enabling technology for several strategic fields, including power electronics, illumination, and sensors. This reprint collects the 23 papers covering the full spectrum of the above applications and providing contributions from the on-going research at different levels, from materials to devices and from circuits to systems.

Keywords

energy storage system --- power conditioning system --- silicon carbide --- vanadium redox flow batteries --- AlGaN/GaN --- SiC --- high electron mobility transistor --- Schottky barrier diode --- breakdown field --- noise --- charge traps --- radio frequency --- wide-bandgap (WBG) --- gallium nitride (GaN) --- silicon carbide (SiC) --- high electron mobility transistor (HEMT) --- metal-oxide-semiconductor field effect transistor (MOSFET) --- driving technology --- nickel oxide --- annealing temperature --- crystallite size --- optical band gap --- electrochromic device --- indium oxide thin film --- solution method --- plasma surface treatment --- bias stability --- aluminum nitride --- Schottky barrier diodes --- radio frequency sputtering --- X-ray diffraction --- X-ray photoelectron spectroscopy --- piezoelectric micromachined ultrasonic transducers --- ranging --- time of flight (TOF) --- time to digital converter circuit (TDC) --- AlGaN/GaN heterojunction --- p-GaN gate --- unidirectional operation --- rectifying electrode --- first-principles --- density functional theory --- pure β-Ga2O3 --- Sr-doped β-Ga2O3 --- p-type doping --- band structure --- density of states --- optical absorption --- AlN buffer layer --- NH3 growth interruption --- strain relaxation --- GaN-based LED --- low defect density --- gate bias modulation --- palladium catalyst --- gallium nitride --- nitrogen dioxide gas sensor --- laser micromachining --- sapphire --- AlGaN/GaN heterostructures --- high-electron mobility devices --- p-GaN gate HEMT --- normally off --- low-resistance SiC substrate --- temperature --- high electron-mobility transistor (HEMT) --- equivalent-circuit modeling --- microwave frequency --- scattering-parameter measurements --- GaN --- MIS-HEMTs --- fabrication --- threshold voltage stability --- supercritical technology --- GaN power HEMTs --- breakdown voltage --- current collapse --- compensation ratio --- auto-compensation --- carbon doping --- HVPE --- AlN --- high-temperature --- buffer layer --- nitridation --- high-electron mobility transistor --- heterogeneous integration --- SOI --- QST --- crystal growth --- cubic and hexagonal structure --- blue and yellow luminescence --- electron lifetime --- wafer dicing --- stealth dicing --- laser thermal separation --- dry processing --- laser processing --- wide bandgap semiconductor --- photovoltaic module --- digital signal processor --- synchronous buck converter --- polar --- semi-polar --- non-polar --- magnetron sputtering --- HTA --- GaN-HEMT mesa structures --- 2DEG --- X-ray sensor --- X-ray imaging --- n/a


Book
Functional Natural-Based Polymers
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Year: 2022 Publisher: Basel MDPI Books

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Natural polymers are already used for a variety of biomedical applications, including drug delivery, wound healing, tissue engineering, biosensors, etc. However, they have also found other applications, for example, in the food industry, the pharmaceutical industry, as firefighting materials, water purification, etc. Different polysaccharide and protein-based systems have been developed. They each have their properties that render them useful for certain applications such as the water solubility of alginate, the thermo-sensitivity of chitosan, the abundance of cellulose and starch, or the cell adhesion and proliferation of gelatin and collagen. This Special Issue will explore the design, synthesis, processing, characterization, and applications of new functional natural-based polymers.

Keywords

light conversion film --- cellulose acetate --- europium --- sensitization --- X-ray photoelectron spectroscopy --- surface plasmon resonance --- thin film --- quantum dot --- 4-(2-pyridylazo)resorcinol --- chitosan --- graphene oxide --- 3D printing --- carboxymethyl cellulose --- hydrogel --- lyophilization --- dissolution --- release model --- customization --- NO-donor --- topical release --- polymeric matrices --- microbial infections --- wound healing --- blood circulation --- semisynthetic polymers --- natural rubber --- rice husk ash --- alginate --- mechanical properties --- dielectric properties --- nanohydrogel --- food applications --- biopolymers --- polysaccharide --- neural network --- chicken feet --- sensorial quality --- food quality --- gelatine --- hyaluronic acid --- polyethylene oxide --- electrospinning --- nanofibers --- wound dressings --- pectin --- pectinase --- wheat bran --- banana peel --- Bacillus amyloliquefaciens --- prebiotics --- mucilage --- pectin polysaccharide --- Opuntia ficus-indica --- aloe vera --- acemannan --- Cactaceae --- Asphodelaceae --- porcine gastric mucin --- methacryloyl mucin --- double-cross-linked networks --- circular dichroism --- mechanical characterization --- date palm trunk mesh --- cellulose --- lignocellulosic waste --- alpha cellulose --- nanocellulose --- agro-byproduct --- Bacillus licheniformis --- bioconversion --- pomelo albedo --- sucrolytic --- lubricant --- tribology --- albumin deposition --- contact lens --- surface roughness --- bio-based polyurethanes --- prepolymers --- cellulose-derived polyol --- cellulose-citrate --- polyurethane composites --- poly(lactic acid) --- nanocomposites --- tannin --- lignin --- thermal degradation kinetics --- decomposition mechanism --- pyrolysis --- nanocomposite --- nanofertilizer --- slow release --- ammonia oxidase gene --- quantitative polymerase chain reaction --- microflora N cycle --- nutrient use efficiency --- soil N content --- aerogels --- cold plasma coating --- hydrophobization --- pore structure --- chitinous fishery wastes --- chitinase --- crab shells --- Paenibacillus --- N-acetyl-D-glucosamine --- phenol --- adhesive hydrogels --- nanomaterials --- surface modification --- latex --- lignocellulosic fibers --- conventional fillers --- CNC --- esterification reaction --- graft copolymerization --- hydrophobic modification --- flocculant --- crosslinking --- peptides --- glutaraldehyde --- specified risk materials --- laccase --- melanin --- decolorization --- natural mediators --- glycerol --- polymer electrolyte --- ionic conductivity --- biochemistry --- pH and rumen temperature --- protozoa --- zero valent iron --- nanoparticles --- ethylene glycol --- methylene blue --- polyhydroxyalkanoates --- poly(3-hydroxybutyrate-co-3-hydroxyhexanoate --- melt processing --- extrusion --- injection molding --- elongation at break --- crystallization --- DoE --- oil palm biomass waste --- anionic hydrogel --- swelling --- salt crosslinking agent --- CoNi nanocomposite --- cellulose paper --- antibacterial potential --- degradation --- annealing --- acetylation --- potato starch --- emulsion capacity --- FTIR --- Malva parviflora --- natural polymers --- physicochemical properties --- rheology --- birch wood --- pre-treatment --- process parameter --- lignocellulose --- 2-furaldehyde --- Komagataeibacter --- stretchable bacterial cellulose --- enhanced strain --- vitamin C --- collagen --- anisotropy --- electron irradiation --- tensile test --- activated carbon --- MnO2 --- Co NPs --- antibacterial activity --- hydrogels --- antimicrobial activities --- functionalized materials --- cellulose derivatives --- flexor tendon repair --- anti-inflammatory --- anti-adhesion --- antimicrobial --- polymer-based constructs --- biosorbent --- copper --- adsorption --- model studies --- aqueous medium --- biodegradable polymers --- chemical modification --- food packaging --- free radical polymerization --- superabsorbent --- water-retaining agent --- thermal properties --- Mimosa pudica mucilage --- extraction optimization --- Box-Behnken design --- response surface methodology --- pH-responsive on–off switching --- zero-order release --- antimicrobial activity --- bacterial cellulose --- cytotoxicity --- nisin --- stability

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